Laser/Radiation Safety

Question 1

An electron is known as a _____ particle. Then an _____ particle may be emitted.

Answer 1

beta

alpha

Question 2

Different units of measure are used depending on what aspect of radiation is being measured. True or false?

Answer 2

true

Question 3

For example, the amount of radiation being given off, or emitted, by a radioactive material is measured
using the conventional units: (2)

What is the SI unit?

Answer 3

Curie (Ci)

becquerel (Bq) is SI unit

Question 4

Radiation dose absorbed by a person units (2):

What is SI unit?

Answer 4

rad

gray (Gy) is SI unit

Question 5

Biological risk of exposure to radiation units: (2)

What is SI unit?

Answer 5

rem

sievert (Sv)

Question 6

What are used to detect levels of radiation? (2)

Answer 6

geiger - muller counter

scintillation counter

Question 7

What is the radiation equation?

Answer 7

1 / d²

Question 8

If the radioactive substance is within the body of the patient, all or part of this energy may be absorbed by the tissues. All the energy of ____ and ____ particles is absorbed by the surrounding tissues.

Answer 8

alpha

beta

Question 9

______ rays as a proportion of the radiation escapes the body.

Answer 9

Gamma

Question 10

Most sensitive organs/tissue to radioactive activity: (5)

Answer 10

gonads

bone marrow

colon

lung

stomach

Question 11

Tissue sensitivity depends on tissue _____ factor.

Answer 11

weighting

Question 12

ALARA is an acronym. Definition?

Answer 12

as low as reasonably achievable

Question 13

X ray protection

Which provides the better and least protection?

Indicate the curves on the graph.

Answer 13

d-composite is least, top solid line

lead is most protective, bottom solid line

Question 14

If back is facing radiation, resulting effect is _____ _____.

Answer 14

double exposure

Question 15

Wall that protects someone from x ray protection:

Answer 15

composite shield

Question 16

Answer 16

symbol for laser radiation

Question 17

Answer 17

ionizing radiation

Question 18

Answer 18

radiation

Question 19

Laser materials (2)

Answer 19

Nd - YAG

CO2 , most commonly used

Question 20

Types of Lasers (3)

Answer 20

• Gaseous Lasing Medium
  
  • CO2, Ar, Kr, He-Ne
• Solid Lasing Medium
  
  • Synthetic Gem Crystal YAG
• Liquid Dyes or Semiconductors
  
  • Excimer (Excited dimer)

Question 21

Helium-neon (He-Ne) wavelength

color: ______
wavelength: _____

typical application: _______

Answer 21

red

632 nm

aiming beam

Question 22

Class 4 of laser definition:

Answer 22

Hazardous if viewed directly or from diffuse reflection.

Also produces fire hazards and skin hazards.

Question 23

Most medical lasers including CO2, Nd: YAG, argon, and KTP are class ___ lasers.

Answer 23

4

Question 24

Are there control measures to evaluate class 4 lasers?

Question 25

What type of laser cuts deepest?

Answer 25

Nd: YAG

Question 26

What type of laser is used to cut surface of the eye?

Answer 26

excimer

Question 27

What type of laser will goes deeply into the layer of skin to remove tumors and growths?

Answer 27

CO2